fix(infrastructure): increase screenshot timeout to decrease flakes (#…

…373)

package.json

@@ -18,7 +18,7 @@
     "test:watch": "karma start karma.local.js --auto-watch",
     "test:unit": "npm run clean && NODE_ENV=test karma start karma.local.js --single-run",
     "test:unit-ci": "karma start karma.ci.js --single-run",
-    "test:image-diff": "MDC_COMMIT_HASH=$(git rev-parse --short HEAD) MDC_BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD) mocha --compilers js:babel-core/register --ui tdd --timeout 10000 test/screenshot/diff-suite.js",
+    "test:image-diff": "MDC_COMMIT_HASH=$(git rev-parse --short HEAD) MDC_BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD) mocha --compilers js:babel-core/register --ui tdd --timeout 20000 test/screenshot/diff-suite.js",
     "test:screenshots": "docker run -it --rm --cap-add=SYS_ADMIN -e MDC_GCLOUD_SERVICE_ACCOUNT_KEY=\"${MDC_GCLOUD_SERVICE_ACCOUNT_KEY}\" mdcreact/screenshots /bin/sh -c 'git checkout .; git checkout master; git pull; npm i; /home/pptruser/material-components-web-react/test/screenshot/start.sh; sleep 35s; npm run test:image-diff'",
     "upload:screenshots": "node ./test/screenshot/upload-screenshots.js"
   },